Boat motor?

I had one it was a 1972 boat motor
From marysville Ohio . it was a great littie engine in a 71 dart I replaced the crank the cam had it machine to .030 over an line hone cleaned the cylinder wall . it ran a best of 12.03 [email protected] @ 110.68 with ported j heads
Just my 2 cent oh I forgot the boat that my engine came out of had been on fire .😁 it was a 340engine